Each name of a Domain in the Internet consists separated names of a consequence of through points. The English designation Top level Domain (range translates highest level; Abbreviation TLD) designation thereby the last names of this consequence and represents the highest level of the dissolution of name. If the computer is called for example www.wikipedia.org, then org the Top is level Domain of this computer name.

In the Domain Name System so mentioned (DNS) the complete names and concomitantly the TLDs are referenziert and dissolved, assigned thus to a clear IP address. The registration place puts on thereby a data base entry over the owner, who makes WHOIS inquiries possible over minutes of the same name, similarly a directory.

TLDs can be divided thereby in three main groups:

• general TLDs (towards Eric TLDs; gTLDs) and
• country-specific TLDs (country code TLDs; ccTLDs).
• area-specific TLDs

Country-specific TLD designators consist thereby always of two letters, general and area-specific TLDs consist of two or more letters.

General Top level Domains

.aero - aeronautics, for organizations active in aviation - world-wide

.arpa - TLD of the original Arpanets, now uses and Routing parameter AREA as ADDRESS

.biz - business, only for companies - world-wide

.com - commercial, originally only for US firms, now freely for everyone - world-wide (*)

.coop - cooperatives (cooperatives) - world-wide

.edu - educational, only for educational facilities (for example www.mit.edu) (*)

.gov - government, only government organs of the USA (for example www.whitehouse.gov) (*)

.info - information suppliers - world-wide

.int - international government organizations (for example www.nato.in t or www.eu.in t)

.jobs - jobs, only for companies with employments offered - world-wide

.mil - military, only for military mechanisms of the USA (for example www.army.mi l) (*)

.mobi - mobile, representation of the web pages particularly for mobile terminals, sTLD - world-wide

.museum - museums - world-wide

.name - only for natural persons or families (private people) - world-wide

.net - net administrative mechanism - world-wide (*)

.org - reserves organization, originally for not-commercial organizations, in the meantime generally approved - world-wide (*)

.pro - professions (lawyers, tax counsel, physicians, engineers) - only for occupational groups mentioned of the USA, Canada, Germany and the united kingdom

.travel - for the travel industry (e.g. Travel agency, airlines etc.)

(*) = originally the only TLD, which existed

Due to the liberal assignment rules for the TLDs .com, .net, .org, .info as well as (with smaller restrictions) .biz and (recently) .name the original meaning of these TLD was misplaced however as far as possible. Such TLD refers not necessarily to an appropriate use. Thus the ICANN calls this TLDs also "„unsponsored, open and unrestricted "“(unsponsored TLD: uTLD). Something similar applies by the way also to many ccTLD (see below, misuses). The TLDs .aero, .coop and .museum however is subject to certain restrictions and of the ICANN accordingly also as "„sponsored "“is described (sponsored TLD: sTLD).

.arpa the TLD should be original only a temporary solution during the mechanism of the DNS in the Internet, however the later dissolution of these Domain than unpractical turned out. The Subdomain in ADDR ARPA is world-wide in the use, in order to make a dissolving possible of a IP address into a Domainnamen (reverse lookup), a further Subdomain, e164.arpa, becomes for ENUM, which uses addressing of Internet services over telephone numbers.

Articles in category "Top level Domain"

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Related Websites

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• Country Coded Top Level Domains (ccTLD's)
  The official list of all country specific TLD's, including .us, .uk, and .tv, plus links to where...


• IANA | Domain Name Services
  There are two types of top-level domains, generic and country code, ... Below you will find links to more information about each type of top-level domain, ...


• IANA | Generic Top-Level Domains
  The .mobi domain is reserved for consumers and providers of mobile products and services and is sponsored by mTLD Top Level Domain, Ltd. The .museum domain ...


• ICANN | Top-Level Domains (gTLDs)
  Internet Corporation for Assigned Names and Numbers.


• Top-level domain - Wikipedia, the free encyclopedia
  A top-level domain (TLD) is the last part of an Internet domain name; that is, ... For example, in the domain name nintendo.com, the top-level domain is com ...


• Top-level domain - Wikipedia, the free encyclopedia
  A top-level domain (TLD) is the last part of an Internet domain name; that is, ... For example, in the domain name nintendo.com, the top-level domain is com ...